I don't get hung up on diagnoses. My main diagnosis - which is Borderline PD, has stayed with me through various psychiatrists, psychologists, psych nurses, etc. That's about the only thing they seem to agree on. I don't know where and when the C-PTSD thing came up, but while in hospital, the reviewing shrink mentioned it. I don't think it's an official DSM diagnosis anyway. But the concept of it, I'd say fits my experience.
But it doesn't matter. I really don't care - for me the Borderline label clarified many things to me. Why I was the way I was. How different symptoms will appear for me during periods of stress. And the prescription for it - the DBT in the last 6 years has been helpful. That's what matters.
I don't consider myself recovered. But I do have some new skills to put into practice. They don't always work, but at least they do some of the times. I think the difficulties I have will always be there. That's another thing that matters to me, that I realise cannot be simply "fixed". And it's going to be a on-going battle.